Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

  • Fiber Amplifiers:

Photonics Spectra
May 1999
More Power With Less?

Stephanie A. Weiss, Executive Editor

Amplifying telecommunications signals in optical fiber systems is a relatively straightforward process: Signal photons + pump photons + erbium atoms = more signal photons.

Wavelength division multiplexing (WDM) has changed the power equation by multiplying the signal photons tremendously. The trick, these days, is to supply enough pump photons to amplify all of those new signal photons.

Fundamental physics limits the power available from a single-mode semiconductor pump diode laser, so users are combining several pumps or chaining several amplifiers to produce the photons they need. Ultimately, though, they are clamoring for pump sources that will provide more power, reliably - and at a price that can compete with multipump options.

Recent high-power options include multimode lasers, fiber lasers, diode-pumped microlasers and some promised semiconductor devices that have yet to emerge from the lab.

Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!